Well, ALchuck, I respectfully agree to disagree with you on this one. You're partly right- the modeler produces a line level output, not the *mic level* that reaches the board from a mic'd up cab. The sound of a microphone being impacted by moving air is a sound I've come to associate with electric guitar for 30 years, and attempts to duplicate that sound by any form of direct input thus far have failed- badly. Most people use amp and cab combinations with too much color (distortion) to reproduce amp and cab models in real acoustic space.
I've had my best luck by sending the line out from the modeler into a powered reference monitor, and mic'ing that. Then one mic is placed into the near field, and jacked into a good mic pre. This produces less noise than any combo amp I've tried. It sounds like hell in the room, unless you're listening right in the near field. When using a real cab, I've gotten very good results by using a power amp bridged to 8 ohms mono into an acoustic amp speaker, mounted in a 1X12 cab. That's alright though, you have every right to not like it. I guess my mileage varies.-Richie